When a submissive feels totally owned, his balls are no longer his. It is a short read and a glimpse in a bdsm household from a sissy point of view. It is concise and chronicles some experiences of his life with his Mistress. Eventually he will refer to a castration event where we see how becoming an eunuch is performed; it is presented mainly as a Mistress choice. It may seem extreme, but the way it is shared in the book we capture the fact that the submissive's balls are a way for the Mistress to show ownership and for him a new step in his slavery's path.
There is regular BDSM with both genders of doms and subs and is usually filled with foreplay and aftercare, and the then is Feminism filled with cruelty and humiliation with no empathy whatsoever. I feel like even this specific kink is confined by boundaries and limited imagination. I wouldn't mind a story about a Roman countess with ACTUAL slaves and orgies instead of this Modern United States without human rights. It just feels off.